Maggy Mwangi
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Researchers investigated how the size of a bowl affects how much ice cream people tend to
scoop when serving themselves. At an “ice cream social”, people were randomly given
either a 17 oz or a 34 oz bowl and were invited to scoop as much ice cream as they liked.
Did the bowl size change the selected portion size? (DeVeaux et al., 2009)
Small bowl: n: 26, y(bar): 5.07oz, s: 1.84oz
Large bowl: n: 22, y(bar): 6.58oz, s: 2.91oz
Test an appropriate hypothesis and state your conclusions (for assumptions and conditions
that you cannot test, assume they are sufficiently satisfied to proceed)